[EpiData-list] Validation duplicate files

Dear Epidata_list,

I'm a new member of this list and a fairly new user of the Epidata software.

In attempting to validate duplicate files not entered in same sequence by two observers I have difficulty in performing the test under documebt/validate duplicate files. Attempting to perfom the test with a selected key field of case-id an error is given; "Duplicate keys found" and the validation is terminated.

Is it possible to perform a comparison of the two datasets despite the fact that the registrations are not performed in same sequence with regard to registration of the observations?

Siincerely,

Lars